title: Active angular alignment of gauge blocks in double-ended interferometers.
abstract: This paper presents a method implemented in a system for automatic contactless calibration of gauge blocks designed at ISI ASCR. The system combines low-coherence interferometry and laser interferometry, where the first identifies the gauge block sides position and the second one measures the gauge block length itself. A crucial part of the system is the algorithm for gauge block alignment to the measuring beam which is able to compensate the gauge block lateral and longitudinal tilt up to 0.141 mrad. The algorithm is also important for the gauge block position monitoring during its length measurement.
authors.affiliation: Institute of Scientific Instruments, Academy of Sciences of the Czech Republic, Královopolská 147, Brno 612 64, Czech Republic. buchta@isibrno.cz.
authors.forename: Zdeněk
authors.initials: Z
authors.lastname: Buchta
authors.forename: Simon
authors.initials: S
authors.lastname: Reřucha
authors.forename: Václav
authors.initials: V
authors.lastname: Hucl
authors.forename: Martin
authors.initials: M
authors.lastname: Cížek
authors.forename: Martin
authors.initials: M
authors.lastname: Sarbort
authors.forename: Josef
authors.initials: J
authors.lastname: Lazar
authors.forename: Ondřej
authors.initials: O
authors.lastname: Cíp
mesh_terms: D000465:Algorithms; D002138:Calibration / Q000592:standards; D061827:Dimensional Measurement Accuracy; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation* / Q000379:methods* / Q000592:standards; D038622:Internationality; D007834:Lasers; D014894:Weights and Measures